Global Electron Thermodynamics in Radiatively Inefficient Accretion Flows

Abstract In the collisionless plasmas of radiatively inefficient accretion flows, heating and acceleration ions electrons are not well understood. Recent studies in gyrokinetic limit revealed importance incorporating both compressive Alfvénic cascades when calculating partition dissipated energy between plasma species. this paper, we use a covariant analytic model flow to explore impact heating, Coulomb collisions, compressional radiative cooling on radial temperature profiles electrons. We show that, independent heat species, even small fraction turbulent makes their scale with virial profile ion-to-electron ratio smaller than case pure heating. contrast, presence larger because is channeled primarily into ions. calculate inner for broad range properties, mass rates, black hole spins that it ranges 5 ≲ T i / e 40. provide physically motivated expression can be used observables from simulations flows wide conditions.